meta: adjust mailmap/AUTHORS to reflect README change

Refs: #41683 (review)

PR-URL: #41751
Reviewed-By: Mestery <mestery@protonmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

.mailmap

@@ -325,6 +325,7 @@ Matthew Turner <matty_t47@hotmail.com> <ramesius@users.noreply.github.com>
 Matthias Bastian <dev@matthias-bastian.de> <piepmatz@users.noreply.github.com>
 Maurice Hayward <mauricehayward1@gmail.com>
 Maya Lekova <apokalyptra@gmail.com> <mslekova@chromium.org>
+Mestery <mestery@protonmail.com> <mestery@pm.me>
 Michael Bernstein <michaelrbernstein@gmail.com>
 Michael Dawson <midawson@redhat.com> <mdawson@devrus.com>
 Michael Dawson <midawson@redhat.com> <michael_dawson@ca.ibm.com>

AUTHORS

@@ -3310,7 +3310,7 @@ nerdthatnoonelikes <kenrag24@gmail.com>
 Nikita Rykov <40735471+angrymouse@users.noreply.github.com>
 Benjamin Mayr <b.mayr@cognigy.com>
 Lew Gordon <lew.gordon@genesys.com>
-Mestery <mestery@pm.me>
+Mestery <mestery@protonmail.com>
 Himadri Ganguly <himadri.tech@gmail.com>
 Howie Zhao <howiezhaohr@hotmail.com>
 Luan Devecchi <luan@engineer.com>